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2201. Count Artifacts That Can Be Extracted There is an n x n 0-indexed grid with some artifacts buried in it. You are given the integer n and a 0-indexed 2D integer array artifacts describing the positions of the rectangular artifacts where artifacts[i] = [r1i, c1i, r2i, c2i] denotes that the ith artifact is buried in the subgrid where: (r1i, c1i) is the coordinate of the top-left cell of the ith artifact and (r2i, c2i) is the coordinate of the bottom-right cell of the ith artifact. You will...